Question

(8*7-16-5*8)*(1+2+3+4+5+6+7+8+9)=

Answer 1

(8*7-16-5*8)*(1+2+3+4+5+6+7+8+9)

=(56-16-40)x(1+2+3+3+4+5+6+7+8+9)

=0x(1+2+3+4+5+6+7+8+9)

=0

Answer 2

( 8 x 7 - 16 - 5 x 8 ) x ( 1 + 2 + 3+ 4 + 5 + 6 + 7 + 8 + 9 )

= ( 56 - 16 - 40 ) x ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 )

= ( 40 - 40 ) x ( 1 + 2 + 3 + 4 + 5 +  6 + 7 + 8 + 9 )

= 0 x ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 )

= 0

Answer 3

KQ là 0